Compressor.



J. B. BENDBR.

COMPRESSOR.

APPLICATION IILBI) 8EPT.12, 1910.

1,019,749. Patented Mar. 12, 1912.

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JOHN B. BENDER, OF TOLEDO,

OHIO, ASSIGNOR TO CAREER W. NEILSEN, TRUSTEE,

OF TOLEDO, OHIO.

COMPRESSOR.

Specification of Letters Patent.

Patented Mar. 12, 1912.

Application filed September 12, 1910. Serial No. 581,520.

To all whom it may concern:

Be it'known that I, JOHN B. Banana, a citizen of the United States,residing at Toledo, Lucas county, Ohio, have invented new and usefulCompressors, ofwhich the following is a specification.-

This invention relates to certain new and useful improvements incompressors.

This invention has utility when embodied in compressors adapted forrefrigeration work, possessing marked advantages as to simplicity inconstruction and efficiency in operation.

Referring to the drawing: Figure 1 is an elevation, with parts brokenaway of an embodiment of the invention in a compressor; Fig. 2 is afragmentary view on an enlarged scale of the chambered cylinder head andvalve therein; Fig. 3 is a section through the piston, showing the valvetherein; Fig. 4 is a fragmentary view of the piston valve in unseatedposition; and Fig. 5 is an end view of the piston looking toward theoutlet side of the piston valve, parts being broken away.

Mounted on the standard 1 is the cylinder 2 having therein the piston 3carried by piston rod 4 to connecting rod 5 engaging crank arm 6 on thedriving shaft 7 This driving shaft 7 for the compressor, is shown ashaving thereon eccentric 8 operating in oval yoke 9 to reciprocateplunger 10 in the chamber 11 and thereby pump lubricant from reservoir12 through duct 13 to the piston rod 4 just above the packing gland 14.This forced lubrication circuit is completed by duct 15. leading back tothe reservoir 12. The lubricant pump runs only while the compressor isworking, and the travel of the piston rod is such as to carry only thinfilms of oil into the cylinder 2. As this lubricated portion of the rod4; is adjacent the intake opening 16 to the cylinder, it is exposed tothe blast of the incoming gas, which thereby effectually disseminatesthe oil sufliciently about the cylinder to effectively lubricate, tothus avoid necessity for special cylinder lubrication as well as insurethe system against excessive lubrication to interfere with handling ofthe The piston is shown as with a grooved periphery to receive thecylinder engaging packing rings 17. On the side of the piston towardintake opening 16, the piston has an annular series of port openings 18in communication with the annular piston opening 19. Oppositelyextending from the openings 18, is a series of openings 20 leading fromthe opening or chamber 19. Extending through the ports or openings 20into chamber 19 is the ring valve member 21, shown as having laterallyextending flanges seating in the piston end, thereby giving this membera cross-section of T-form. The cross-portions 24 of this T-member, havetheir terminals inclined toward the stem of the T-member. These inclines25 seat against corresponding faces of the piston, while at the junctionof the flat portion of the piston seat with its inclined seat portionsthere are grooves 26 which not only serve as aircushion chambers whenthe valve member seats, but also eliminate battering of corners of thevalve member as the seats wear.

The stem portion of the T-member is provided with openings 22 throughwhich extend the pins 23 to limit the unseating travel of the T-member.These pins 23 are retained in position by the small screws 49, coactingwith the threaded pins 23 to preclude rotation and thereby workingloose.

The end of the cylinder 2 toward which the T-member is movablerelatively to the piston 3, is provided with cylinder head 27 havingvalve seat 28 mounted therein and toward which the valve member 29 ismovable. This valve member 29 has integral therewith the hollow ortubular stem 30 coacting to reciprocate in the housing 31 of thechambered discharge head 32 to the cylinder. In this housing 31 andwithin the stem 30, is the element 33 against which seats the spring 34,serving as a yieldable means to normally urge the valve member 29 intoseating position as to the seat menrber 28.

The valve member 21. moves into the piston 3 to result in a flush pistonend, while the opposing cylinder head face comprising the elements 2728, 29, also provides a flush face. This combined feature of the valveshas unusual merit and works to great economy in the installation, owingto their intercooperative action in the single action compressordisclosed. The incoming gas below the piston is not compressed thereinto raise the temperature at this end, so that the lubrication may beefficient, ample and not excessive, due to blast action of the incominggas from opening 16 against the lubricant film on the rod 4. Shaft 7traveling at high speed, unseats the T-member 21 in the downward travelof the piston 3, to allow passage of the gas from below the piston,through openings 18, 19, 20, and past member 21, to the opposite side ofthe piston 3. As the piston 3 starts upward, member 21 is seated and thegas compressed until its pressure is suflicient to overcome resistanceof valve member 29 and the pressure of gas in the chambered head 32.Then the valve member 29 unseats, and the flush features of piston andcylinder head opposing said piston, permit of minimum of clearance to Vsuch an extent as to mean a practical elimination of clearance withresulting maximum of capacity and efficiency in expelling all compressedgas. The downward travel of the. piston immediately pulls a vacuum abovethe piston, to unseat the valve member 21, for a new charge of gas to becompressed.

The travel limiting keys orpins for valve member 21 are so looked as topreclude accidental displacement to interfere with the packing rings orattack the cylinder or piston. The housing of spring 34 precludes anyaccident tospring breakage here, and under normal conditions thepressure of the compressed gas in the chambered head 32 1s a factor inseating the valve member 29.

Accordingly there is shown herein a simple structure of such fool-proofqualitiesas to impart thereto great value in small installations formeat market and small refrigeration plants not employing skilled laborto handle.

The compressed gas from chambered head 32 normally passes through pipe35, pipe 36,

valve 37 to pipe 38, to the coolers or cooling coils, under whichcircumstances the branch 7 closed, valves 45, 40, opened, thusefl'ecting gas travel from line 38, through branch 39, pipe 41 to thecompressor, from which it is delivered by pipes 35, 44, into pipe 43.

hat is claimed and it is desired to secure by Letters Patent is:

The combination with a compressor comprising a cylinder having an inletport and a separate outlet port, and means for drawing gas into thecylinder through said inlet port and for expelling the same through saidoutlet port, of a receiving pipe extending to the inlet port, adischarge pipe eX- tending from the outlet port, and connectionspermitting a reversal of said pipes with relation to said ports, saidconnect-ions comprising a pair of cross-pipes connecting said receivingand discharge pipes, a valve in each cross pipe, a valve in thereceiving pipe between the cross-pipes, and a valve in the dischargepipe between the cross-pipes.

In testimony whereof I aflix my signature in the presence of twowitnesses.

JOHN B. BENDER.

Witnesses:

JOHN J. KEIL, GEO. E. KIRK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

- Washington, D. G.

